Opinion on Big Bangs and Dimensions?

It's a lot easier to visualize a 3d cube becoming a worm in 4D that changes shape and or volume in 4D than it is to visualize what a human body worm would look like in 4d. Nobody can visualize in reality in 5d (well, maybe some mathematical geniuses CAN do that), although I HAVE been able to attempt to visualize abstractly in 7D because of all the years I've been analyzing and interpreting 7 band Thematic Mapper and 4 band MSS satellite images. Even so, that usually makes my head start to ache after a few minutes. :-D